Patricio Quijano defeated Miguel Tobon 6-4 6-3 in the Central America Masters 4 round of 32 on carpet. The upset overturned the form book — Miguel Tobon came in leading the head-to-head 1–0. Patricio Quijano claimed a first win over Miguel Tobon in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1991-08-19 | Colombia Masters 2 | R32 | clay | Miguel Tobon | 6-2 6-4 |